CN105554605A - Circuit for automatically adjusting volume of Bluetooth earphone and implementation method - Google Patents
Circuit for automatically adjusting volume of Bluetooth earphone and implementation method Download PDFInfo
- Publication number
- CN105554605A CN105554605A CN201510912941.7A CN201510912941A CN105554605A CN 105554605 A CN105554605 A CN 105554605A CN 201510912941 A CN201510912941 A CN 201510912941A CN 105554605 A CN105554605 A CN 105554605A
- Authority
- CN
- China
- Prior art keywords
- pin
- circuit
- bluetooth earphone
- serial
- converter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
The invention relates to a circuit for automatically adjusting the volume of a Bluetooth earphone and an implementation method. The circuit comprises a Bluetooth earphone circuit, a serial AD converter, a single-chip microcomputer, a microphone and a loudspeaker; and the circuit also comprises a serial DA converter and a gain variable power amplifier. According to the circuit of the invention, an automatic adjustment circuit is additionally adopted in the Bluetooth earphone circuit; the magnitude of environmental noises is detected in a timed manner according to signal strength on the microphone of the Bluetooth earphone; when the change of the environmental noises exceeds a certain range, the gain of the power amplification of the loudspeaker is automatically adjusted according to loudspeaker volume which is most suitable for current noises and is obtained through calculation, so that the volume of the earphone can be automatically adjusted, and influences brought by different environments can be corrected, and inconveniences brought by manually setting the volume can be avoided.
Description
Technical field
The present invention relates to the application of automatic regulating volume technology on bluetooth earphone, particularly a kind of circuit of automatic adjustment bluetooth earphone volume and implementation method.
Background technology
Bluetooth earphone is applied more and more extensive at present, and in use, because people are often in the ambient noise of varying strength, and the bluetooth earphone volume height can discovered in the ambient noise of varying strength is not identical.Bluetooth earphone is in the past all that the mode manually adjusting earpiece volume height reaches the object adapting to varying environment noise, uses extremely inconvenient.Therefore, need a kind of can the function of environmentally noise intensity adjustment bluetooth earphone volume height automatically.
Summary of the invention
In view of the present situation of prior art and the deficiency of existence, the invention provides a kind of circuit and implementation method of automatic adjustment bluetooth earphone volume, is that a kind of bluetooth earphone volume that can automatically regulate is to adapt to the scheme of different size ambient noise.An automatic condition circuit is increased in Bluetooth earphone circuit, timing is according to the signal strength detection ambient noise size on bluetooth earphone Mike, when the change of ambient noise exceedes certain limit, according to the volume calculated corresponding to the most suitable loudspeaker of current noise, the gain of automatic adjustment loudspeaker power amplifier, to realize automatically adjusting earpiece volume, revise the object of the impact that different environment brings in time, it also avoid inconvenience volume being manually set at every turn and bringing.
The present invention for achieving the above object, the technical scheme adopted is: a kind of circuit of automatic adjustment bluetooth earphone volume, comprise Bluetooth earphone circuit, serial A/D converter, single-chip microcomputer, Mike, loudspeaker, it is characterized in that: the power amplifier also comprising serial D/A converter and variable gain, described Mike's signal is connected with loudspeaker with the power amplifier of variable gain by serial A/D converter, single-chip microcomputer, serial D/A converter successively, and Bluetooth earphone circuit is connected with the power amplifier of serial D/A converter, variable gain respectively.
An implementation method for automatic adjustment bluetooth earphone volume circuit, is characterized in that:
Step is as follows,
After step 1, bluetooth earphone power on, operate in the software startup in single-chip microcomputer, after software initialization, start control task;
Step 2, this task circulation primary per second, the Mike of each control Bluetooth earphone circuit gathers an ambient noise, Digital smooth filtering is carried out to the sound signal intensity collected, filter jump signal, the signal collected sends into the analog input pin of the serial AD conversion chip of newly-increased serial A/D converter circuit, carry out AD conversion, analog signal is converted to digital signal, send into main control singlechip and process;
Step 3, single-chip microcomputer receive the digital signal that peripheral hardware is sent here, judge whether sound signal intensity reaches the threshold value of adjustment amplifier gain, if do not reach threshold value, then enters step 4 and processes, if reach threshold value, then enter step 5 and process;
Step 4, do not reach threshold value and then enter resting state, get back to the activation circular treatment of next second of step 2 wait task;
Step 5, reach threshold value then start software calculate, by calculating the gain compensation value of current noise intensity;
Step 6, gain compensation value are converted to analog signal by the DA conversion chip being connected to single-chip microcomputer serial D/A converter circuit digital signal, send into the voltage follower circuit of operational amplifier composition, carry out dynamic compensation, export to loudspeaker, reach environmentally noise and automatically regulate the object of bluetooth earphone volume;
Step 7, processed after, task enters resting state, gets back to the activation circular treatment of next second of step 2 wait task.
Beneficial effect of the present invention is: the Mike carried by bluetooth earphone gathers sound, only need to improve hardware circuit and program increase computing module, after bluetooth earphone just can be made to have start, environmentally noise adjusts the ability of volume automatically, namely by Mike's perception ambient noise that fuselage carries, and automatically regulate bluetooth earphone volume according to noise size, without the need to each manual adjustment volume of user, decrease the loaded down with trivial details operation of repetition, avoid inconvenience volume being manually set at every turn and bringing, in daily use, possess wide prospect.
Accompanying drawing explanation
Fig. 1 is that circuit of the present invention connects block diagram;
Fig. 2 is the circuit diagram of serial D/A converter of the present invention;
Fig. 3 is the circuit diagram of the power amplifier of variable gain of the present invention;
Fig. 4 is workflow diagram of the present invention.
Embodiment
As shown in Figure 1,2,3, 4, a kind of circuit of automatic adjustment bluetooth earphone volume, comprises Bluetooth earphone circuit, serial A/D converter, single-chip microcomputer, Mike, loudspeaker, also comprises the power amplifier of serial D/A converter and variable gain.
Mike's signal is connected with loudspeaker with the power amplifier of variable gain by serial A/D converter, single-chip microcomputer, serial D/A converter successively, and Bluetooth earphone circuit is connected with the power amplifier of serial D/A converter, variable gain respectively.
Serial D/A converter circuit connects, the VDD7 pin of DA conversion chip U1 connects power supply, GND6 pin ground connection, REB3 pin connects electric capacity C1, one end of resistance R1 and the 1 pin output of operational amplifier U2A, the IOUT5 pin of another termination DA conversion chip U1 of electric capacity C1 and inverting input 2 pin of operational amplifier U2A, power end 8 pin of operational amplifier U2A connects one end and the+5V power supply of electric capacity C2, the other end ground connection of electric capacity C2, normal phase input end 3 pin of operational amplifier U2A, negative power end 4 pin ground connection, the other end of resistance R1 is by electric capacity C3 ground connection; The CS8 pin of DA conversion chip U1, CLK1 pin, SDI2 pin connect on SPI mouth corresponding to single-chip microcomputer, and VREF4 pin connects reference voltage.
The power amplifier circuit of variable gain connects, the normal phase input end 3 pin ground connection of operational amplifier U3A, negative power end 4 pin is by electric capacity C4 ground connection, power end 16 pin connects the other end of serial D/A converter circuit resistance R1, output 1 pin connects loudspeaker by resistance R2, and inverting input 2 pin of operational amplifier U3A connects the audio frequency input of bluetooth earphone.
Hardware components of the present invention is realized by the Circuits System that parallel connection one on original Bluetooth earphone circuit is new.Newly-increased device has the power amplifier of serial A/D converter, single-chip microcomputer, serial D/A converter and variable gain, and the regulating circuit of the additional device composition such as the resistance of periphery, electric capacity, and regulating circuit is independent of the original circuit working of bluetooth earphone.
By SPI interface communication between serial A/D converter, single-chip microcomputer, DA conversion chip.The analog input pin of serial A/D converter is connected on the Mike of Bluetooth earphone circuit.The power amplifier AD605 of a variable gain is directly added, for adjusting the volume of loudspeaker at the original circuit of bluetooth earphone and loudspeaker.The output of DA conversion chip outputs to the gain setting pin 16 of AD605 after the voltage follower circuit that an operational amplifier OPA2227 forms.
A method for automatic adjustment bluetooth earphone volume circuit, step is as follows,
After step 1, bluetooth earphone power on, operate in the software startup in single-chip microcomputer (for MSP430), after software initialization, start control task.
Step 2, this task circulation primary per second, the Mike of each control Bluetooth earphone circuit gathers an ambient noise, Digital smooth filtering is carried out to the sound signal intensity collected, filter jump signal, the signal collected sends into the analog input pin of the serial AD conversion chip (for AD0809) of newly-increased serial A/D converter circuit, carry out AD conversion, analog signal is converted to digital signal, send into main control singlechip and process.
Step 3, single-chip microcomputer receive the digital signal that peripheral hardware is sent here, judge whether sound signal intensity reaches the threshold value of adjustment amplifier gain.If do not reach threshold value, then enter step 4 and process, if reach threshold value, then enter step 5 and process.
Step 4, do not reach threshold value and then enter resting state, get back to the activation circular treatment of next second of step 2 wait task.
Step 5, reach threshold value then start software calculate, obtain the gain compensation value of current noise intensity according to outside noise
Step 6, gain compensation value are converted to analog signal by the DA conversion chip (for AD5543B) being connected to single-chip microcomputer serial D/A converter circuit digital signal, send into the voltage follower circuit that operational amplifier (for OPA2227) forms, carry out dynamic compensation, export to loudspeaker, reach environmentally noise and automatically regulate the object of bluetooth earphone volume.
Step 7, processed after, task enters resting state, gets back to the activation circular treatment of next second of step 2 wait task.
Claims (3)
1. one kind regulates the circuit of bluetooth earphone volume automatically, comprise Bluetooth earphone circuit, serial A/D converter, single-chip microcomputer, Mike, loudspeaker, it is characterized in that: the power amplifier also comprising serial D/A converter and variable gain, described Mike's signal is connected with loudspeaker with the power amplifier of variable gain by serial A/D converter, single-chip microcomputer, serial D/A converter successively, and Bluetooth earphone circuit is connected with the power amplifier of serial D/A converter, variable gain respectively.
2. the circuit of a kind of automatic adjustment bluetooth earphone volume according to claim 1, it is characterized in that: described serial D/A converter circuit connection is, the VDD7 pin of DA conversion chip U1 connects power supply, GND6 pin ground connection, REB3 pin meets electric capacity C1, one end of resistance R1 and the 1 pin output of operational amplifier U2A, the IOUT5 pin of another termination DA conversion chip U1 of electric capacity C1 and inverting input 2 pin of operational amplifier U2A, power end 8 pin of operational amplifier U2A connects one end and the+5V power supply of electric capacity C2, the other end ground connection of electric capacity C2, normal phase input end 3 pin of operational amplifier U2A, negative power end 4 pin ground connection, the other end of resistance R1 is by electric capacity C3 ground connection, the CS8 pin of DA conversion chip U1, CLK1 pin, SDI2 pin connect on SPI mouth corresponding to single-chip microcomputer, and VREF4 pin connects reference voltage,
The power amplifier circuit of described variable gain connects, the normal phase input end 3 pin ground connection of operational amplifier U3A, negative power end 4 pin is by electric capacity C4 ground connection, power end 16 pin connects the other end of serial D/A converter circuit resistance R1, output 1 pin connects loudspeaker by resistance R2, and inverting input 2 pin of operational amplifier U3A connects the audio frequency input of bluetooth earphone.
3. automatically regulate an implementation method for bluetooth earphone volume circuit, it is characterized in that:
Step is as follows,
After step 1, bluetooth earphone power on, operate in the software startup in single-chip microcomputer, after software initialization, start control task;
Step 2, this task circulation primary per second, the Mike of each control Bluetooth earphone circuit gathers an ambient noise, Digital smooth filtering is carried out to the sound signal intensity collected, filter jump signal, the signal collected sends into the analog input pin of the serial AD conversion chip of newly-increased serial A/D converter circuit, carry out AD conversion, analog signal is converted to digital signal, send into main control singlechip and process;
Step 3, single-chip microcomputer receive the digital signal that peripheral hardware is sent here, judge whether sound signal intensity reaches the threshold value of adjustment amplifier gain, if do not reach threshold value, then enters step 4 and processes, if reach threshold value, then enter step 5 and process;
Step 4, do not reach threshold value and then enter resting state, get back to the activation circular treatment of next second of step 2 wait task;
Step 5, reach threshold value then start software calculate, by calculating the gain compensation value of current noise intensity;
Step 6, gain compensation value are converted to analog signal by the DA conversion chip being connected to single-chip microcomputer serial D/A converter circuit digital signal, send into the voltage follower circuit of operational amplifier composition, carry out dynamic compensation, export to loudspeaker, reach environmentally noise and automatically regulate the object of bluetooth earphone volume;
Step 7, processed after, task enters resting state, gets back to the activation circular treatment of next second of step 2 wait task.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912941.7A CN105554605A (en) | 2015-12-11 | 2015-12-11 | Circuit for automatically adjusting volume of Bluetooth earphone and implementation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510912941.7A CN105554605A (en) | 2015-12-11 | 2015-12-11 | Circuit for automatically adjusting volume of Bluetooth earphone and implementation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105554605A true CN105554605A (en) | 2016-05-04 |
Family
ID=55833503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510912941.7A Pending CN105554605A (en) | 2015-12-11 | 2015-12-11 | Circuit for automatically adjusting volume of Bluetooth earphone and implementation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105554605A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037767A (en) * | 2017-05-09 | 2017-08-11 | 昆明理工大学 | A kind of elevator door safety real-time control apparatus based on embedded Bluetooth ranging |
| CN108111670A (en) * | 2017-11-28 | 2018-06-01 | 湖南海翼电子商务股份有限公司 | Automatically adjust the method, apparatus and bluetooth headset of bluetooth headset volume |
| CN109842827A (en) * | 2019-03-19 | 2019-06-04 | 吉安市立讯射频科技股份有限公司 | A kind of bluetooth headset for exempting from key regulating system with acoustic control |
| CN110300347A (en) * | 2019-07-02 | 2019-10-01 | 西安易朴通讯技术有限公司 | Volume adjusting method, device and a kind of earphone |
| CN110827863A (en) * | 2019-11-08 | 2020-02-21 | 西安闻泰电子科技有限公司 | Method, device and terminal for intelligently adjusting volume and readable storage medium |
| CN111954116A (en) * | 2020-09-02 | 2020-11-17 | 东莞智富宝科技服务有限公司 | Bluetooth headset and volume self-adaption method thereof |
| CN112291664A (en) * | 2020-10-30 | 2021-01-29 | 歌尔光学科技有限公司 | Volume adjusting method, device and system of head-mounted display equipment |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406923A (en) * | 1981-10-28 | 1983-09-27 | Cbs Inc. | Automatic loudness controller |
| JPH0494204A (en) * | 1990-08-08 | 1992-03-26 | Matsushita Electric Ind Co Ltd | Gain control circuit and environment noise collection device |
| CN101030762A (en) * | 2007-01-15 | 2007-09-05 | 四川长虹电器股份有限公司 | Volume controlling method and controller |
| CN201937801U (en) * | 2010-12-29 | 2011-08-17 | 上海华勤通讯技术有限公司 | Automatic volume adjusting Bluetooth headset |
| CN102395077A (en) * | 2011-11-23 | 2012-03-28 | 河南科技大学 | Anti-interference earphone |
| CN103825996A (en) * | 2012-11-16 | 2014-05-28 | Gn奈康有限公司 | Communication device |
-
2015
- 2015-12-11 CN CN201510912941.7A patent/CN105554605A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4406923A (en) * | 1981-10-28 | 1983-09-27 | Cbs Inc. | Automatic loudness controller |
| JPH0494204A (en) * | 1990-08-08 | 1992-03-26 | Matsushita Electric Ind Co Ltd | Gain control circuit and environment noise collection device |
| CN101030762A (en) * | 2007-01-15 | 2007-09-05 | 四川长虹电器股份有限公司 | Volume controlling method and controller |
| CN201937801U (en) * | 2010-12-29 | 2011-08-17 | 上海华勤通讯技术有限公司 | Automatic volume adjusting Bluetooth headset |
| CN102395077A (en) * | 2011-11-23 | 2012-03-28 | 河南科技大学 | Anti-interference earphone |
| CN103825996A (en) * | 2012-11-16 | 2014-05-28 | Gn奈康有限公司 | Communication device |
Non-Patent Citations (1)
| Title |
|---|
| 张向阳，贾杰: "可变增益放大器AD604在B超前端电路的应用", 《科技创新导报》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037767A (en) * | 2017-05-09 | 2017-08-11 | 昆明理工大学 | A kind of elevator door safety real-time control apparatus based on embedded Bluetooth ranging |
| CN108111670A (en) * | 2017-11-28 | 2018-06-01 | 湖南海翼电子商务股份有限公司 | Automatically adjust the method, apparatus and bluetooth headset of bluetooth headset volume |
| CN109842827A (en) * | 2019-03-19 | 2019-06-04 | 吉安市立讯射频科技股份有限公司 | A kind of bluetooth headset for exempting from key regulating system with acoustic control |
| CN110300347A (en) * | 2019-07-02 | 2019-10-01 | 西安易朴通讯技术有限公司 | Volume adjusting method, device and a kind of earphone |
| CN110827863A (en) * | 2019-11-08 | 2020-02-21 | 西安闻泰电子科技有限公司 | Method, device and terminal for intelligently adjusting volume and readable storage medium |
| CN111954116A (en) * | 2020-09-02 | 2020-11-17 | 东莞智富宝科技服务有限公司 | Bluetooth headset and volume self-adaption method thereof |
| CN112291664A (en) * | 2020-10-30 | 2021-01-29 | 歌尔光学科技有限公司 | Volume adjusting method, device and system of head-mounted display equipment |
| CN112291664B (en) * | 2020-10-30 | 2022-03-11 | 歌尔光学科技有限公司 | Volume adjusting method, device and system of head-mounted display equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105554605A (en) | Circuit for automatically adjusting volume of Bluetooth earphone and implementation method | |
| CN106714017B (en) | A kind of method, apparatus, terminal and earphone adjusting earphone sound field | |
| US8682384B2 (en) | Mobile terminal, and volume adjusting method and device thereof | |
| CN103237281B (en) | The earphone line control circuit of a kind of mobile terminal and line control method | |
| CN201839344U (en) | Mobile terminal capable of adjusting volume automatically | |
| CN107277683B (en) | Audio amplification system and method | |
| CN106470374A (en) | Volume adjusting method, wearable device, terminal unit and sound volume regulating system | |
| CN104717594A (en) | Hearing-aid system, hearing-aid mobile phone and hearing-aid method thereof | |
| CN105049606A (en) | Mobile terminal microphone switching method and switching system | |
| CN105979416A (en) | Line control earphone | |
| CN105763736A (en) | Adaptive noise volume regulating device, method thereof and mobile terminal | |
| CN103905953A (en) | Processing method and wearable electronic device | |
| CN103780733A (en) | Mobile phone receiver volume adjusting system and mobile phone receiver volume adjusting method | |
| CN105451137A (en) | User equipment wake-up method and device | |
| CN205793160U (en) | A kind of noise cancelling headphone | |
| CN106249793B (en) | Power regulator circuit | |
| CN205195956U (en) | Automatic adjust circuit of bluetooth headset volume | |
| CN108200519B (en) | Microphone and method for improving overload sound pressure | |
| CN203151729U (en) | Multifunctional earphone | |
| CN103347104B (en) | The mobile device that can externally charge | |
| CN205454036U (en) | Earphone converter and earphone | |
| CN105450191A (en) | Dual-line silicon microphone amplifier | |
| CN104902364A (en) | Hearing aid system and hearing aid headset | |
| CN203537335U (en) | Volume automatic adjustment system based on environmental noises | |
| CN202721728U (en) | Mobile phone and audio amplification output circuit thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160504 |
|
| WD01 | Invention patent application deemed withdrawn after publication |